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Abstract
Hawkeye soybeans (Glyclne max L.) were grown for 13 days in nutrient solutions in a glasshouse with differential Ca and trace metal concentrations. Yields were little affected by low Ca levels without excesses of trace metals but yield depressions for excesses of Ni, Cd, Al, Ma, and Cu generally were greater at low Ca levels than at a high level. Ca, Mg and K levels in plants were all depressed by the trace metals. Some of the effects were expressed also in roots. The 10–3M level of Al resulted in virtually no Ca in roots and in diminished transport to shoots. The trace metal concentrations in leaves generally decreased with increasing Ca.
